Tool



May 11, 1937.

B. N. BLETSO ET AL TOOL ' :5 Sheets-Sheet 3 Filed Jan. 16, 1936 m\ E Q lnueniaxsz' /V. 5257-50 40/ yCLflEE/VC Patented May 11, 1937 UNITED STATES PATENT OFFICE TOOL Application January 16, 1936, Serial No. 59,470

2 Claims.

This invention relates to tools, and more particularly those such as are used for applying fastener elements to unite the overlapping ends of box strapping and the like.

In a co-pending application of Clarence O. Carlson, entitled Fastener, filed December 29, 1933 and bearing Serial No. 704,561, there is disclosed a novel fastener element for uniting the ends of overlapped tying elements, and partictularly box strapping and the like, in such manner as to positively prevent their relative movement. The novel fastener element of the co pending application comprises an inverted substantially U-shaped blank. This blank has a plurality of apertures which extend inwardly from both of its longitudinal edges, and the axes of the bends f the legs of the inverted U intersect the substantial mid-portions of the apertures. The function of this fastener element is to embrace with its downwardly extending legs the overlapped ends of a tying element of the type referred to and to permit the partial shearing of lugs from the latter. through the aperture of the former. The side edges of the lugs so formed will interlock with the side edges of the apertures of the fastener element and make for extreme rigidity.

It isamong the objects of the present invention to provide a novel tool which will operate in an extremely efficient manner to apply fastener elements of the type referred to.

Another object is the provision, in such a tool, of novel means of correctly positioning the fastener element therein.

The foregoing and further objects will be apparent after referring to the drawings, in which:

Figure 1 is an elevation of the tool of the present invention.

Figure 2 is a perspective of the fastener element which the tool is intended to apply.

Figure 3 is a sectional end View of the fastener element and the box strapping to which it has been applied.

Figure 4 is a fragmentary sectional elevation of the tool.

Figure 5 is a sectional vie-w on the line V-V of Figure 4.

Figure 6 is a view similar to that of Figure 4 but showing the elements in another stage of operation.

Figure 7 is a sectional view on the line VII-VII of Figure 6.

Figure 8 is a sectional view on the line VIIIVIII of Figure 7.

Referring more particularly to the drawings,

the numeral 2 designates the housing of the tool of the invention. This housing 2 pivotally supports, as at 3, a pair of spaced levers 4. The

inner sides of these levers 4 are recessed, as at 5, and the lowermost extremities thereof inwardly extended, as shown at 6. A die 8 is disposed in each of the recesses 5 and secured therein by a pair of capscrews 9. Each of these dies 8 is profiled, to provide a plurality of spaced shearing surfaces l0.

An anvil I2 is disposed between the dies 8 and secured by capscrews I3 to. the lower extremity of the housing 2. This anvil I2.is profiled, as shown at M, to receive the spaced shearing surfaces lil on the dies 8.

The upper end of each of the levers 4 is connected by a pin l5 to an extended operating handle l6. Each of the operating handles l6 carries an inwardly extending ear H and these are connected together by a pin I8. This pin I8 is mounted in a collar 19 which rides in a vertical slot 20 in the housing 2, thus permitting the uniform opening and closing of the dies 8 on the levers 4 with respect to the anvil H.

The housing 2 carries a pair of oppositely extending ears 23, to each of which there is pivoted, as at 24, a lever 25. The lower extremities of the lever 25 are of enlarged U shape, as shown at 26, and provided with inverted U-shaped recesses 21. These inverted U-shaped recesses are slightly wider than the box strapping A in Figures 2 and 3, but not as wide as the fastener elements B which are to be applied thereto, for a purpose to be later described.

The pin I8, which is carried in the collar [9 in the groove 20 in the housing 2, carries a cap 30 on each of its ends. These caps 30 are relatively adjusted with respect to the pin l8 by means of shims 32 and are provided with ends 33 which are profiled for contact with the correspondingly recessed surfaces 34 of the levers 25. The upper ends of the levers 25 are connected by a coiled tension spring 35.

In operation, the box strapping A is tensioned around a package with its ends overlapping, and a U shaped fastener element 13 disposed over the latter. While in this position the leg portions C of the fastener element extend downwardly with apertures D exposing both edges of both ends of the box strapping A.

The tool is placed over the box strapping A and fastener element B with its operating handles IS in extreme outward, or open, position, as shown in Figure 4. While the operating handles I6 are in this position, the levers 4 are open,

as are the levers 25, whose upper ends are spaced apart by the blocks 30 on the ends of the pin l8. As the operating handles l6 are manually brought together, the pin [8 and its collar 59 descend in the vertical slot 26 in the housing 2, as shown in Figure 6. This movement of the pin l8 causes the profiled ends of the blocks 30 to move down the recesses 34 in the adjacent surfaces of the levers 25. The blocks 33 on the pin l8 thus move out of the recesses 34 in the levers 25 and cause the upper ends of the latter to separate, as shown in Figure 7. This causes the enlarged U-shaped lower ends 25 of the levers 25 to move inwardly and engage the ends of the inverted substantially U-shaped fastener element B and move it into proper position with respect to the dies 8 on the levers 4 and the anvil l2 which is carried by the housing 2.

As the lower ends of the levers 4 are moved together, their inwardly extended lowermost extremities 6 bend the downwardly extending leg portions C of the fastener element B against the lower side of the lower box strap A. The continued movement of the levers 3 causes the application of the fastener element and the interlocking therewith of partially sheared lug portions D from the edges of the box strapping, as shown in Figure 3.

While we have shown and described one specific embodiment of our invention, it will be understood that we do not wish to be limited exactly thereto, since various modifications may be made without departing from the scope of our invention, as defined by the following claims.

We claim:

1. A device for applying a U-shaped fastener element having a plurality of apertures, comprising a housing, a pair of jaw members pivotally mounted on said housing, means on the lowermost extremities of said jaw members for causing said fastener element to tightly embrace the object to which it is to be applied, a die secured to the inner face of each of said jaw members, means for operating said jaw members, and means operable by said last named means for positioning the fastener element between said dies.

2. In a device for applying a clip to overlapped tying elements, a pair of pivoted jaw members, means for operating said pivoted jaw members, and means operable by said first named means for positioning said clip between said pivoted jaw members, said last named means comprising a pair of pivoted levers movable toward and away from said pivoted jaw members at substantial right angles thereto.

BRUCE N. BLETSO. CLARENCE O. CARLSON. 

